Supplemental air supply mechanism for automotive engines



Jan. 29, 1952 LASERSQN 2,584,033

SUPPLEMENTAL AIR SUPPLY MECHANISM FOR AUTOMOTIVE ENGINES Filed Feb. 25,1949 s Sheets-Sheet 1 Hrrwe/vEv.

Jan. 29, 1952 LASERSON 2,584,033

SUPPLEMENTAL AIR SUPPLY MECHANISM FOR AUTOMOTIVE ENGINES Filed Feb. 25,1949 3 Sheets-Sheet 2 mmummum/"d;

I N VEN TOR. F a-052m M ZASEESOM SUPPLEMENTAL AIR SUPPLY MECHANISM FORAUTOMOTIVE ENGINES Filed Feb. 25, 1949 Jan. 29, 1952 F. M. LASERSON 3Sheets-Sheet 5 JNVENTOR.

EDA-emu M Laseesom Patented Jan. 29, 1952 UNITED STATES "OYFEI CE.

SUPPLEMENTAL AIR SUPPLY MECHANISM 'FOR' AUTOMOTIVE ENGINES 1 FrederickMrLaserson,-Los1Angeles, Galif.

Applicatiori'February 25,"1949;"SeriaI Nth-785358 ..-,.32...Claims.

Thisinvention" related-to -means for improving'the air supply system for-internal--combustion engines "such" as are used -'in "automotivevehicles.

"It' is "an object of this invention to: provide "sity of alterationinthe design 'orin-theadjristment? of conventional types of engines orcar- ""buretors; andwithout-employing any appreciable engine powentoachieve the purpose.

"It is another obj ectof this invention to provide such-means-comprisinga motor driven impeller incorporated "in" an air intake channel leadingto' thecarburetor, the motorbeingwholly or partly withinsaid channel;or'ad-jacent there- "to.

It is another object of" this invention to provide a "motor' "drivenimpellerbetween the air cleaner and the-carburetor and incorporatedwholly'or partly in the'air-cleaner.

-Itis another object ofthis inventiorr' to" provide means for improvingthe air 'supply systems of automotive engineswhich is--controlled"automaticallyin accordancewith the operation *of the engine.

It is another *object ofthis invention to provide an improved means *forthe purpose de- --scribecl which is controlledin-accordance with theopening and closing of the eng-ine throttle.

It-is another objectof this invention to provide an improved means forsupplying 1 air--to theair supply-systems of automotive engines which ais controlled automatically as a function -"of "openingand closing ofthe-engine throttle.

It is afurther-object of thisinventionto-pro- *vide'means' for supplying-air= tothe engine 1 car- 'buretor additionally to that normallypassingto the "carburetor, which--means becomesinoperative responsivetorelease of the engine throttle so as not to interfere with 'or' impairthe-operation of the engine at idling speeds.

It is another objector-*this invention topro- "vide such means which is'controlled as aa function of the speed-of the engine.

This' invention""possesses many other advandescribed in detail,illustrating the general" prin- .ciples of. the invention; .but it is:to-betunder'stood thatzthis detailed descriptionziscnot ttolkbeetaken-.=.;in a, limiting 581188,;1811'166 ntheusc'ope:of cthe zina ventionis-lbest defined-shy;theiappendedmlaims.

.32 In the accompanying drawings: Figure 1 :is an 'elevation,-partlyinsection,

v showing one" form of motor driven i impeller, :in-

"novel meansfor this purpose Without the-neces- \1 stalled "for useZE'igure 2-is across-sectiontaken substantially as indicated by line 2 2of Figure'l;

Figure 3 isa vertical-section; partly schematic,

- showing one or the motor controls;

"Figure 4 is a similar vieww'showingu: another form" of control;

Figure 5 is -a *cross section taken substantially as indicated 'by line5-5 of Figure :4;

Figure G is a circuit diagram of electrical controls Figure Ms aschematic view showing a modified form or motor control;

Figure 8 isa diagrammatic view *showing a Y FigureQis a;view similar toFigure 1,-butshow- *ing a modified form of the invention;

"Figure 10 is a" transverse section, taken substantially as indicated byline 0- 0 of-Figure 9;

*Figure 11 is "anothei view similar to" Figure. 1,

- but showing a-further modified' form of the invention;

"Figure 12=is a transverse section,--taken substantially as indicated byline l'2| 2 of' Figure Figure 13 is a view partly in section and largelyschematic showing a throttle-actuated "air-con- Referring to V thedrawings; particularly Figures land 2, a--conventional air cleaneris in-"dica-ted by the numeral 5 and-"has an axially -extending outletpassage- 6 connectedwi-th'the 'air intake passage of a conventional;down dr'aft carburetor 8" by the =-aidofa channel forming -member9, thecarburetorw supplying the -explosive mixture for an internal -combustionen- 40' gine (not shown) The -member:- 9- is fastened to' the =bottom ofthe air cleaner 5 -asby screws 12,and'is detaohabIy secured to theairhorn4l3 ot the carburetor -8;- by "the aid ofa :clamping 1 band l 4'in a well "understood manner.

take channel- 16 formed by the member 9 ;:.being -mounted on one end of-the shaft 'l'l ofsan elec- I trio :motor' .I 8:\ verticallyidisposedzin the; air: cleaner :passage 'l flmandnsupportedkaby thelaid: ofr a bracket 5 I 9. i uMeans .to :be 1. describedlspresently,

'2 arerprovided; for engaging the :motors I8 intaci l cordanceivwith:athe operationztof the engine; and .1; lpreferablyufromf. 1thelelectrical; system: commonly mprovided withlsuchmanuengine. :a Eurther,brake meanszflll areiprovidedmfor'lrestraining rotatiom ofctnthezimpellerzl 5 when ,thexmctor 1 8r is deenerg-ized.

Referring to Figures 2, it will be seen that the member 9 has a sideextension or housing 2| providing a pair of spaced walls 2i-a and 2l-bslidably mounting a brake member 24 of magnetic material urged to engagethe flange I5-a of the impeller l5 by a compresion spring 25 confinedbetween the inner wall 2l-b and a flange 24-a on the member 24. Anelectromagnet 26 is mounted in the housing 2! adjacent the member 24,and when energized attracts the brake member 24 with sufficient force toovercome the spring 25 so that the impeller I5 is released. The magnet.26 is connected for simultaneous energization with the motor l8, thus,when the motor [8 is energized the brake member 24 is released and whenthe motor is deenergized the member 25 reengages responsive to spring 25which exerts sufficient force to cause the impeller l5 to stopsubstantially immediately.

It is desirable that the amount of air delivered by the impeller E5 tothe carburetor, in addition to that normally drawn by the vacuum of theengine be a function of the operating conditions of the engine withwhich the system is asso ciated. Thus, at high speeds, it is generallydesirable that a greater amount of air be delivered to the carburetorthan under idling or light load conditions. Means are therefore providedto control the volume of extra air to the best advantage of ,the engine.Such means may take innumerable forms and be subject to variouscombinations and arrangements, as will suggest themselves from thepreceding and following examples.

As shownin Figure 6, the motor I8 is arranged to be-energized by meansof a source of electrical energy 30 which may comprise the usual storagebattery 31 and generator 32 of an automotive vehicle. One side of thebattery and generator are connected to a common ground such as thevehicle frame the other sides being connected by a lead 33 from which alead 34 is connected to one side of the motor 18. A conventionalmanually operated rheostat 35, including a switch 35-01., isincorporated in the lead 34 for optionally controlling operation of themotor l8 in conjunction with certain automatic means now to bedescribed. Thus, a second switch 31, interposed in lead 34 serves toprevent energization of the motor l8 upon actuation of the clutchmechanism commonly provided with automobile engines and the like, todisconnect the engine from driving relation with the vehicle or otherload.

As is well understood such mechanism is usually spring urged into loaddriving relation and includes a pivoted lever or pedal 38 for opposingthe spring and actuating the mechanism v to disconnect the load.Referring to Figure 4,

the pedal -38 is urgedcounterclockwise to the limiting position shownwhen the clutch is allowed to engage, and is swung clockwise by suitablepressure when the clutch is disengaged.

An insulation block 39 is mounted beneath the floor'board 40 and has apair of contact members M and 42 respectively secured on opposite sidesthereof, adapted to be bridged by A-compression spring 45 urges the arm43to open thecontacts; a screw 46 serving 4 to appropriately limit suchmovement. An insulation block 47 is provided on arm 63 to engage thelever 38, as the lever 38 nears the limit of its travel in loadconnecting direction so that its final movement as the load is connectedwill cause the lever 33 to close the contacts M and s2. Conversely, whenthe lever 38 is swung clockwise to disconnect the load, the lever t3will be freed to move away from the contacts ii and 42 under theinfluence of the spring s5 and open the contacts. Supplemental meansincluding a variable resistance 55 and switch means 5i responsive tovarious operating conditions of the engine, such as the throttle openingor the speed of the engine or associated mechanism may be provided inthe motor control circuit.

Referring to Figure 3, a pedal 55 pivotally mounted on the upper side ofa floor board 56 is arranged to operate a member 5? pivotally mountedbelow the floor board 55 and connected at one end as til-a to thethrottle (not shown) usually provided for controlling an engine of thetype under consideration, by the aid of linkage 55. A tension spring 59,shown by way of example as connected to the member 5? adjacent one endthereof, serves to urge the throttle toward closed position and againsta suitable stop (not shown) which maintains the throttle sufiicientlyopen to permit the engine to operate at idling speed. Such movement ofthe lever 57 in throttle closing direction moves the pedal 55 upwardlyfrom the floor 55, appropriate pressure on the pedal 55 serving to movethe parts in the opposite direction against the force. of the spring 59and open throttle.

A tubular element 55 of suitable metal or other conducting material ispivotally mounted on the end 57-?) of the member 5? opposite the linkage58 by the aid of a pin 5| secured on the exterior of the tube 65. Thelower end of the tube as is closed by a long plug 62 of insulatingmaterial which mounts a contact 63 having a shank 5t projecting from thetube 55 for connection with a lead 55. The upper end of the tube 65 hasa plunger 65 of conducting material slidable therein, and in goodconducting relation therewith. The plunger 65 has a reduced portionEli-a which extends from the tube 60 through a bushing Bi and is urgedoutwardly by a compression spring 68, a collar 69 on the plunger 56limiting such outward movement. The outer end of the plunger 66 isformed as a ball 55-h engaging a suitable socket 55-a in the pedal 55,the inner end of the plunger forming a contact "i2 adapted to engage thecontact B3'which contacts cooperate to form the switch 5|. Contact 12 isnormally maintained in spaced relation with contact 53 by the spring6-8. When the contacts 63, '12 are closed, contact 63 is grounded bycontact 12, plunger 5%, tube 60 and the throttle linkage 51, 55. Thearrangement issuch that spring 59 exerts a greater force opposingmovement of the tube EU in throt tle opening direction than can beexerted by the spring 58. Thus, whenever pedal 55 is depressed to openthe throttle, contacts 53, T2 are closed causing energization of themotor i3 and brake release coil 26 and operation of the impeller i5.

When the pedal 55 is released to allow the engine to idle, the contacts53, 12 open, deenergizin the motor [8.

To vary the speed of the motor E8 in accordance with the throttleopening, the resistor 14 is provided, being mounted in a protectivecasingw15of insulating, material by the aid of a their connected ends.

"lar 85, in a well understood manner.

1 through bolt 16' passingthr'ough the "resistor I4 andengaging-theheads I5-a.- and l5-b' at theopposite ends of the casing 15. Theresistor His shown by Way of example as a wire 'wound resistor with theturns of wireforming respectively contacts providing progressivelyvarying values of resistance. The upper end of the resistorl4gisconnected by lead Tito the bolt iii,- the projecting end of whichserves-as a binding "post to which thelead 85 is connected.

A-contact arm I8 cooperates'with the resistor I4 to form the rheostat 50and has a conducting roller I9 which extends througha-slot-l5-c in the"wall of the casing 15 and engages the "resistor contacts. The roller i9is appropriately insulated from the'arm'IB and is connectedto the motorI 8 "by'a lead 89. The arm I8 is pivotally-mounted at BI in a'bracket 82secured beneath the floor board 56, and has an angled extension lS-aagainst which a spring E3 is confined for urging the arm 18 upwardlyabout its pivot to' maintain the roller It? in contactwith the resistor54.

moves correspondingly with respect tothe roller F9 to progressivelyreduce the portion of the re 'sistance in the'circuit, and thus vary themotor speed and with it the amount of" air supplied additionally by theimpeller to the carburetor.

If desired, the speed of the motor I8 and impeller I5 may be made tovaryas a functionbf the speed of the engine or of some moving part of thevehicle. One form of mechanism for this purpose is shown in Figure 7 andcomprises a 'frame 98 rotatably mounting a shaft 9I carrying a pulley 92at one end adapted tobe connected in driving relation with the desiredpart, as by the aid of a belt 93. The'shaft 9| has aconventionalfiy-ball governor 94 mounted thereon comprising a collar 95fixed on theshaft and a sleeve'96 axially slidable on the shaft. Pairsof arms 9'! and98 pivotallyjoined at oneend are connected respectivelyat-their other ends to the collar 95 and sleeve 96, and carry Weights 99at As the shaft 9I rotates, the weights tend to move outwardly duetocentrifugal force, urging sleeve 96 toapproach col- A contact arm I90 ismounted on sleeveilt to move axially therewith whilepermittingfree'rotaticn thereof, and has a downward extensionIllfi-aslidably engaging a guide bar I9 I. A compression spring I92 onthe bar hill is adjustably confinedngainst [the extension IIl9-a by anut "I93 and urges the engaged by a conducting roller I05 carried by the"upper end of arm -I Bil. The arrangement is such that the roller medoes not contact the resistor I04 until shaft-9| reaches a predeterminedminimum speed, thus serving as a switch. Thereafter, further increase inspeed causesthe roller I95 to advance along theresistor I94 toward theleadIIl'l, which may-correspond with the lead fillof the previouslydescribed form, progressively reducing the resistance in themotorcircuit and causing the speedof the motor lt to increase.

"metrically opposite contacts connected respectively to the other sideof the aid of lead l 06. Reduction in the sp'eed oi -shaft 9| will allowthe contact roller I05 to move in'the opposite directionin responsetospring 402, increasing the resistance in the m'otorcircuit andreducingthe speed of the motor I8, and eventual'ly opening thecontact-with the-resistor Hi4,

stopping the motor. By appropriateadjustments, this contact openingmaybe causedto occur at engine idling speed.

If "desired, a motor having a split field winding may be substitutedfor--the motor Ill and the rheostat 59. A' motor I99 of this type isshown diagrammatically in Figure 8 and comprises a pair of fieldwindings III) and III, each formed "in-two sections IIB-aand IID-b,III-a and III-b respectively. The control switchtherefor comprisesastationary plate II2 having angularly spaced contacts II3 and II4 andII5 connected respectively to one side of the power circuit" and towinding sections IIii-a and IIll-b, and dialIfi, III and II8 i 8, themotor 509 is deenergized. Appropriate "counterclockwise movement "ofswitch member II 9will causesegment I2i! to close contacts H3 and H4,and'segment 'I2I to close contacts H6 and I ll. Thus, current will flowfrom one power lead through winding section I I 0-a to the motorarmature, thence through winding section III-a tothe'other power lead,and the motor will opat full speed.

The switch member I I9 may be arranged to be operated in accordance withthe throttle open- 7 operating arm !22 adapted to be connected as by theaid of a link I23 with the foot pedal 55 (Figure 3) in lieu of themechanism shownthere- T in or with arm I99 (Figure '7) in lieu of thevarimotor be located in the air cleaner. 55

ing a lateral air outlet is shown, connected by a horizontal channelforming member I25 with the carburetor I21. The impeller driving motor-I28 and the impeller I29 are both mounted in the able resistancearrangement I94, I96.

It is not necessary that the impellerdriving Thus, in Figure 9, afragment of an air cleaner I25 havair channel. An automatic brake ISO isprovided as before (Figure 10).

In Figures 9 and 10 a throttle actuated air control is shown at Mt!which is automatic and controlled by the opening and closing of thethrottle valve. This air control I49 comprises an opening MI in the wallof the air channel forming member I26, and having a disc closure I42slidable on a rod I43 extending through the opening MI and supported bycross bar I44. A spring I45 urges the disc I42 to closing position,

"being adjustably confined against the disc as by a knurled nut I46threaded on the rod I43. The

"arrangement is such that whenthe pressureoi the air delivered by theimpeller I29 reaches a "the roller l05*isconnected toground as bythe'lo'predeterminedamount, the closure I42 *is unseated, allowing air toescape and reducing the pressure.

a In Figures 11 and 12, a fragment of an air cleaner I3I similar to thatof Figure 1 is shown, the air outlet thereof being connected by avertical channel forming member I32 with the carburetor I33. The memberI32 has a semi-circular enlargement I32-a on one side for accommodatingthe impeller I34, and a circular flanged opening I35 in which the motorI36 is mounted,

the motor I36 thus being partly within the air channel. Automatic brakemeans I3I for checking rotation of the impeller I34, responsive toclosing of the engine throttle, are provided. This brake I3! comprisesan arm I5'I, rockably mounted within the air channel by the aid of ashaft I58 extending through the wall of the member I32 and carrying abrake shoe I59 adapted to engage the periphery of the impeller I34. Alever I60 is fixed on the outer end of shaft I58 and is connected withan arm I62 provided on the engine throttle I53 by a lost motionconnection including a link I6I having a slot I6I-a engaged by a pin"52-11 on arm I62. The engine throttle I63 is provided with conventionaloperating means (not shown). The arrangement is such that when thethrottle I63 is open the weight of the brake shoe I59 and arm I5'I urgethe shoe I59 out of engagement with the impeller I34, such movementbeing limited by contact of lever I60 with a stop pin I64. As thethrottle I63 approaches closed position, pin I62-a engages the lower endof slot I6I-a and applies the brake. Opening of the throttle I63releases the brake, and it will be readily apparent that movement of thethrottle I63 except as it reaches or leaves closed position will notaffect the brake, pin I62-a sliding freely in slot I6I-a.

In Figure 13 an air control I50 is shown which is linked to the throttlevalve so as to be positively controlled by the opening and closingthereof. An opening I5I in the wall of the air channel forming member isprovided with a butterfly closure I52 having an operating arm I53connected to an arm I54 provided on the engine throttle I55 which hasconventional operating means (not shown). The arms I53 and I54 areconnected for simultaneous movement by a link I56, the arms being sodirected and proportioned that opening movement of the throttle I55causes closing movement of the closure I52 to a desired extent, and viceversa.

I claim:

1. In an air supply system for the internal combustion engine of anoperative motor vehicle including a carburetor having an air intakechannel: means including an impeller mounted in said channel forproviding an additional supply of air to that normally passing to thecarburetor; an electric motor for driving said impeller; and meansresponsive to an operating condition of said motor vehicle forcontrolling said additional supply of air.

2. In an air supply system for an automobile internal combustion engineincluding a carburetor; means including an impeller for providing anadditional supply of air to that normally passing to the carburetor; anelectric motor for driving said impeller; and control means includingswitch and brake mechanism.

3. In an air supply system for an automobile internal combustion engineincluding a carburetor: means including an impeller for providing anadditional supply of air to that normally passing tothe carburetor; anelectric motor for driving said impeller; switch means for said motor;brake mechanism for said impeller; and operating means for said brakemechanism.

4. In an air supply system for an automobile internal combustion engineincluding a carburetor, and means forming an air intake channel to saidcarburetor: an air impeller in said channel for forcing into the normalair-gasoline mixture of the carburetor air in excess of that normallyobtainable by the carburetor from the atmosphere; and an electric motorfor driving said impeller.

5. In an air supply system for an automobile internal combustion engine,including a carburetor and an air cleaner having an air passage to saidcarburetor; means for providing an additional supply of air to thatnormally passing to the carburetor, comprising an impeller in saidpassage and an electric driving motor therefor.

6. In an air supply system for an automobile internal combustion engine,including a carburetor and means forming an air intake channel therefor:an impeller in said channel for providing an additional supply of air tothat normally passing to the carburetor; a motor for driving saidimpeller; and means for controlling the supply of air deliveredby theimpeller, including a friction brake for quickly reducing the speed ofthe impeller.

'7. In an air supply system for an automobile internal combustionengine, including a carburetor and an air cleaner channel: an impellerin said channel for providing an additional supply of air to thatnormally passing to the carburetor; an electric motor for driving saidimpeller; and means including electroresponsive means for controllingsaid motor.

8. In an air supply system for an automobile internal combustion engine,including a carburetor; a throttle controlling said engine; means foroperating said throttle; means including an impeller, for providing anadditional supply of air to that normally passing to said carburetor; amotor for driving said impeller; means controlling said motor includinga switch and a variable resistance; and means whereby initial movementof said throttle operating means in throttle opening direction closessaid switch, movement thereafter reduces said resistance, and release ofthe throttle operating means-opens said switch.

9. In an air supply system for an automobile internal combustion engine,including a carburetor: an impeller for providing an additional supplyof air to that normally passing to said carburetor; an electric motorfor driving said impeller; and means controlling said motor as afunction of the engine speed.

10. In an air supply system for an automobile internal combustionengine, including a carburetor, means forming an air intake channel tosaid carburetor, and a throttle for controlling said engine: meansincluding an impeller, for providing an additional supply of air to thatnormally passing to said carburetor, and valve means controlling saidadditional supply of air in accordance with the opening and closing ofsaid throttle, comprising a spring pressed closure responsive tovariation in air pressure in said channel to open and to close.

11. In an air supply system for an automobile internal combustionengine, including a carburetor, means forming an air intake channel tosaid carburetor, and a throttle for controlling said engine: meansincluding an impeller, for

providing an, additional supply of airwto that normally passing to saidcarburetor, and valve meanscontrolling said additional supply of air inaccordance avith the opening and closing of saidthrottle, comprising aclosure, and means forming a mechanical connection between said closureand said throttle to cause opening movement of said closurein responseto closing, of said throttle and closing movement of said closure inresponse to opening movement of said throttle.

12. In air supplying system foran automobile internal combustion engine,including a carbu: retor: means for optionally connecting said engine indriving relation with a load; means including an impeller for providing,an additional supply of air to that normally passing to said carburetor;a motor for driving said impeller; and means responsive to disconnectionof said load for deenergizing said motor. i 13. In an air supply systemfor an automobile internal combustion engine, including a carburotor andmeans. forming anair intake channel therefor: an impeller for providingan-additional supply of air to that normally passing ,to saidcarburetor; an electric motor for driving said impeller; switch meansfor controlling said motor; and brake means forrestraining rotation ofsaid impeller responsive to the switchmeans.

1 1. In an air supply system for an automobile internal combustionengine, including a carburetor and means forming an air intake, channeltherefor: an impeller for providing an additional supply of air tothatnormally passing to said carburetor; an electric motor for driving saidimpeller; switch means controlling said motor; nor- L mally engagedbrake means restraining rotation of said impeller; and electr-magneticmeans for releasing said brake means, operated in response toenergization of said motor. v

15. In air supply system for an automobile internal combustion engine,including a carburetor; means including a movable member foroptionallyconnecting said engine in driving relation with aload; means includingan impeller for providing an additional supply of air to that normallypassing to said carburetor; a motor for driving said impeller;optionally operable switch means for connecting said. motor with asource of ourrent; and-means operated by movement of said member todisconnect said load, to disconnect said motor from said source.

16. In an air supply system tor an automobile internal combustionengine, including a, carburetor: means for optionally connecting saidengine in driving relation with a load; means including an impeller forproviding an additional supply of air to that normally passing to saidcarburetor; an electric, motor for driving said impeller; meansresponsive to the operating conditions of said engine for controllingsaid motor; and means responsive to disconnection of said load, causingdeenergization of said motor.

17. In an air supply system for an automobile internal combustionengine, including a carburetor: means for optionally connecting saidengine in driving relation with a load; means including an impeller forproviding an additional supply of air to that normally passing to saidcarburetor; an electric motor for driving said impeller; meanscontrolling said motor as a function of the engine speed; and meansresponsive to disconnection of said load, causing deenergization of themotor.

18. In an air supply system for an automobile internal combustion engineincluding a generator 10 having means forming an air channel for sup,-plying air thereto; a throttle for controlling said engine; meansincluding an impeller in said channel for providing an additionalsupply. of air to that normally passing to said carburetor; an electricmotor for driving said impeller; and switch means shuttingoff said motorresponsive to the closing of said throttle to an idling position. I

19.. In an air supply system for an automobile internal combustionengine, including a carburetor: a throttle for controllingsaidengine;means foroperating said, throttle, including ,a pivoted arm; means for.optionally connecting said engine in driving relation with aload,;ineluding a pivotedarm; means including an impeller for movingairto said carburetor; .anelectric motor for driving said impeller;andmeans, including a switch, operated by each of said arms forcooperatively controlling said motor in, ace cordance with thethrottleopening and the connection of said load with the engine. r

20. In an air supply system for an automobile internal combustionengine, .including a carbue retor: a throttle for controlling saidengine; means for operatingsaid throttle; means, including a movablemember, for optionally connecting said engine in driving relation with aload; means including an impeller for moving air to said ,carburetor;,anelectric motor for drivingsaid impeller; a normally engaged brake, re-

straining rotation ofsaid impeller; means for releasing said brake uponenergization of said mo: tor; means for controlling said motor inaccordance with the throttle opening, operated by the throttle operatingmeans. l

21. In an air supply system for an automobile internal combustionengine, including acarburetor: means, including a movable member, for

optionally connecting said engine in driving relation With, a load;,meansincluding an impeller; for moving air to said carburetor; anelectric motor for driving said impeller; friction brakere strainingrotation of said impeller; means .for releasing said brake uponenergization of said motor; means for controlling said motor inaccordance with the speed of the engine; and switch means operated bysaid movable member for deenergizing said motor upon disconnection ofsaid load from the engine. a

I 22. In an air supplysystem for an internal combustion engine,including a carburetor: means including an impeller for providing anadditional supply of air to that normally passing to said carburetor;and a speed responsive circuit controller for controlling said motor,comprising; a rotatable shaft adapted to be driven in accordance withthe speed to which response is desired; a fly ball governor mounted onsaidshaft to rotate therewithincluding an axially slidable sleeve; acontact arm rotatably engaging said sleeve, and restrained againstrotation to move axially with the sleeve; and a resistance having spacedcontact forming means connected to progressively varying portions ofsaid resistance and adapted to be respectively contacted by said arm.

23. In a circuit-controller: an elongated guide member having a switchcontact therein; an element slidable in said guide and having acooperating contact; a pressure member for urging said contact elementinwardly of said guide to close the contacts; means resiliently opposinginward movement of said element; means mounting said guide member formovement in a generally longitudinal direction; means resilientlyopposing movement of said member to cause said contacts to close; aresistance mounted for movement with said guide member, connected to oneof said contacts, and having spaced contact forming means connected toprogressively varying portions of said resistance; and a contact armadapted to respectively engage said contacts upon movement of saidresistance.

24. In an air supply system for an automotive vehicle engine, includinga carburetor, an air cleaner, and means forming an air intake channelbetween said air cleaner and said carburetor, said vehicle including asource of electrical energy; an impeller for moving air through saidchannel; an electric motor for driving said impeller; a normally engagedbrake restraining rotation of said impeller; electrically actuated meansfor releasing said brake; and means connecting said motor and saidactuating means for substantially simultaneous energization by saidsource.

25. In an air supply system for an automobile internal combustion engineincluding a carburetor; a throttle for controlling said engine; meansincluding an impeller for providing an additional supply of air to thatnormally passing to the carburetor; an electric motor for driving saidimpeller; and brake mechanism operated in accordance with the positionof said throttle for restraining rotation of said impeller.

26. In an air supply system for an automobile internal combustion engineincluding a carburetor; a throttle for controlling said engine; meansincluding an impeller for providing an additional supply of air to thatnormally passing to the carburetor; an electric motor for driving saidimpeller; brake mechanism for restraining rotation of said impeller,including a rockable member; and means forming a lost motion connectionbetween said throttle and said member whereby movement of said throttleto closed position actuates said brake mechanism.

, 27. In an air supply system for the internal combustion engine of anoperative motor vehicle, including a carburetor having an air intakechannel, an impeller mounted in said channel for forcing an additionalamount of air into the carburetor to that normally passing to thecarburetor, means for rotating the impeller, and means for stopping therotation of said impeller actuated by an operating control of saidvehicle.

28. In an air supply system for the internal combustion engine, of amotor vehicle including acarburetor having an air intake channel, animpeller in said channel for forcing an additional supply of air intothe carburetor to that normally passing to, the carburetor, an electricmotor for rotating said impeller, and an electric switch for startingand stopping said motor actuated by and operating control of the motorvehicle. 7

29. In an air supply system for the internal combustion engine of amotor vehicle including a carburetor having an air intake channel, animpeller in said channel for forcing an additional supply of air intothe carburetor to that normally passing to the carburetor, an electricmotor for driving said impeller, an electric switch for starting saidmotor responsive to an operating control of said motor vehicle and forstopping said motor responsive to another operational control of themotor vehicle, and means for varying the speed of said electric motorresponsive to varying conditions of operation of said motor vehiclebetween said first two conditions of operational controls.

30. In an air supply system for the internal combustion engine of amotor vehicle, including a carburetor, a throttle controlling theengine, and means for operating the throttle including means urging thethrottle to a position causing the engine to idle; means including animpeller for providing an additional supply of air to that normallypassing to the carburetor, and means associated with said throttleoperating means for stopping the operation of said impeller incident torelease of said throttle operating means.

31. In an air supply system for the internal combustion engine of amotor vehicle, including a carburetor, a throttle controlling theengine, and means for operating the throttle including means urging thethrottle to a position causing the engine to idle; means including animpeller for providing an additional supply of air to that normallypassing to the carburetor, and means associated with said throttleoperating means for stopping the operation of said impeller incident toreturn of said throttle to said'idling position.

32. In an air supply system for the internal combustionengine of a motorvehicle, including a carburetor,;a throttle controlling the engine, andmeans foribperating the throttle including means urging the throttle toa position causing the engine to idle; means including an impeller forproviding an additional supply of air to that normally passing to thecarburetor, an electric motor for operating said impeller, a switch forcontrolling said motor, and means operating upon release of saidthrottle operating means for operating said switch to shut off saidmotor.

' FREDERICK M. LASERSON.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,557,793 Berger et a1. Oct. 20,1925 1,840,253 Richardson Jan. 5, 1932 2,106,237 Bush Jan. 25, 1938

